chanelink logo
CHANELINK
English

Scientists build high-power cladding-pumped Raman fiber laser in 1.2 μm band

1194
2024-01-31 13:58:14
See translation

Laser sources operating in the 1.2 μm band have some unique applications in photodynamic therapy, biomedical diagnostics, and oxygen sensing. In addition, they can be used as pump sources for mid-infrared optical parameter generation and visible light generation through frequency doubling.

Laser generation in the 1.2 μm band has been achieved by different solid-state lasers, including semiconductor lasers, diamond Raman lasers, and fiber lasers. Among these three types, fiber lasers are an excellent choice for generating 1.2 μm band lasers due to their simple structure, good beam quality, and flexible operation.

Researchers led by Professor Pu Zhou from the National University of Defense Technology in China are interested in high-power fiber lasers in the 1.2μm band. Most of the current high-power fiber lasers are ytterbium-doped fiber lasers in the 1 μm band, and the maximum output of the 1.2 μm band is limited to 10 watts.

Their research, titled "High-Power Tunable Raman Fiber Laser in the 1.2 μm Band," was published in Frontiers in Optoelectronics.

Their idea is to use the stimulated Raman scattering effect in passive optical fibers to obtain high-power laser generation in the 1.2μm band. The stimulated Raman scattering effect is a third-order nonlinear effect that converts photons to longer wavelengths.

By exploiting the stimulated Raman scattering effect in phosphorus-doped optical fiber, the researchers converted the high-power ytterbium-doped fiber in the 1 μm band to the 1.2 μm band. A Raman signal with a power of 735.8 W was obtained at 1252.7 nm, which is the highest output power ever reported for a 1.2 μm band fiber laser.

Source: Laser Network


Related Recommendations

  • Chuangxin Laser Industry Dedicated Laser and Solutions Help Promote the Intelligent Development of Cladding Application Industry

    Laser cladding technology, also known as laser additive manufacturing technology, uses high-energy laser as the heat source and metal alloy powder as the cladding material. Through the synchronous action of laser and alloy powder on the metal surface, it quickly melts to form a molten pool, and rapidly solidifies to form a dense, uniform, and controllable thickness metallurgical bonding layer, the...

    2023-11-01
    See translation

  • Intelligent laser welding with dynamic beam shaping function can reduce the demand for filler wire

    In EU project ALBATROSS, Fraunhofer IWS has developed battery housing for E-vehicles.Laser processes with dynamic beam shaping create stable joints even in challenging material combinations. Recent applications demonstrate how to eliminate filler materials while improving quality, energy efficiency, and production logic.Fraunhofer Institute for Material and Beam Technology (IWS) will present novel...

    09-05
    See translation

  • The breakthrough of coherent two-photon lidar overcomes distance limitations

    Schematic diagram of experimental setupNew research has revealed advances in light detection and ranging technology, providing unparalleled sensitivity and accuracy in measuring the distance of distant objects.This study was published in the Physical Review Letters and was the result of a collaboration between Professor Yoon Ho Kim's team at POSTECH in South Korea and the Center for Quantum Scienc...

    2023-12-08
    See translation

  • Tsinghua University has made progress in the field of magnetic field and laser composite processing

    The National Key Laboratory of Interface Science and Technology for High end Equipment at Tsinghua University has made progress in the field of magnetic field and laser composite processing - magnetic field assisted laser shock strengthening of Ti6Al4V alloy. The relevant research was published as a cover article titled "Magnetic Field Assisted Laser Shock Peening of Ti6Al4V Alloy" in the journal ...

    2023-09-16
    See translation

  • Scientists have successfully miniaturized erbium-based erbium lasers on silicon nitride photonic chips

    Scientists from the Federal Institute of Technology in Lausanne (EPFL) have successfully miniaturized a powerful erbium-based erbium laser on silicon nitride photonic chips. Due to the large volume and difficulty in shrinking of typical erbium-based fiber lasers, this breakthrough is expected to make significant progress in optical communication and sensing technology.Since the 1960s, lasers have ...

    2024-06-13
    See translation